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A291656 as a triangular array

0
01
012
0143
0110234
01282591765
018235271291616896
012445133112131361057221195247
017307627431232963568855337691288167662642078
012188114069791282018097680906894234111794893551642187808947940982409

A291656 as a square array

0000000000
111111111
241028822447302188
32325935275133176274311406979
417612916121313612329635612820180976
516891057221885533769809068942341
6195241288167661179489355164
726420721878089479
84098240
9
0000000000
111111111
241028822447302188
32325935275133176274311406979
417612916121313612329635612820180976
516891057221885533769809068942341
6195241288167661179489355164
726420721878089479
84098240
9